Contributed by Jonathan Goodman / Ann Schaumburger is a disciplined and systematic painter. She uses basic geometric motifs (triangle, rectangle, and square) to develop permutations of a core set of four brilliant colors that elaborate the intuitive resonance of a single structure: the gabled roof house. Works recently on view at A.I.R. Gallery draw on miners’ stone houses in Cornwall, England, and prefabricated metal sheds in Amherst, Virginia. The idea of a home, however schematic, evokes real-world associations, establishing a rich and subtle balance between form and content.